Answer this question truthfully
### Question: What causes Essential thrombocytosis?
### Response: Primary thrombocythemia is caused by the overproduction of platelets. If untreated, this condition gets worse over time. Because these platelets do not work normally, bleeding is a common problem.
The disease is part of a group of conditions known as myeloproliferative disorders. Others include:
Chronic myelogenous leukemia Polycythemia vera Primary myelofibrosis
This disorder is most common in middle aged people. It can also be seen in younger people, especially women under age 40.